Method of carding fibrous material



July 22, 1952 w. N. DUNN 2,603,840

METHOD OF CARDING FIBRUS MATERIAL Filed March 18, 1947 y b:un III t rwem/o'fv l "...H [f1/211. N. Dunn VPatented July 22, 1952 f UNIT STATES A. i *i 2,603,841)

jgMEfFHQDQFCaRDiNe FIBROUSMATERIALJ l.

' r `Willem N.Dunn,Martistfgwlva@ Appn'atiaaMarqh1s,1947,seria1No. '135,442 1 l ,dfi Y 1 l Y l This invention relates to'impr'ove'ments in the method and apparatus for cardi'ng brous material, particularly wool.V y 'f In carding systems 'conventionally employed, the brous material is fed in the form of a web to a cylinder rotating at relatively high speed, say 1000 to 1200 feet per minute, and having Wire 'teeth pitched forward in the directionv of `travel for receiving the web. At spaced points around such a cylinder are arranged in4 sets one or more workers with teeth point to point with those on the'main cylinder and one'or more strippers whichengage the workers and have teeth back Lto'jpoint' with those on the maincylinder. The

workers'rotate relatively slowly as compared with 1 claim. (cl. ill- 106) i clear theworkers but slower than the maincylin- "i's' carried forward tothe next set of wrkerspand strippers. In this conventional'system`,`after the last set of workers and strippers, a. doffer is provided rotating at a slower rate than the cylinder and having teeth pitched pointnto point with the cylinder teeth. It is also customary to position a fancy in front of such a doffer to raise both the carded and imbedded stock from the main cylinder clear of the cylinder points so that it may be picked up by points of the doifer and carried on to the next cylinder or to the end of the card or condenser.

A disadvantage of this system is that a portion of the stock becomes imbedded in the wire of the main cylinder soon after delivery and is not subjected to the carding action of the workers in the manner of the stock carried at the outer portion of the cylinder wires. This condition maintains in some degree no matter how many sets of workers and strippers are used-and regardless of the number of main cylinders employed in the system.

It is an object of the present invention to avoid the foregoing and otherv disadvantages of the systems heretofore in use and to provide a very material increase in quality and quantity of the resulting carded material. Specifically, the invention contemplates recovering wel1 carded material directly from the workers without the step as heretofore of returning this material to the main cylinder, mixing it with the residual material thereon, and then raising it by fancy and` doffer for delivery to the condenser,

lsame cylinder,

' stock travels from the i l v y A. A I K *A The inventionl also' contemplates lifting the stock remaining on the main cylinder after relcovery of the carded material. clear of the points of the cylinder for .further cardingaction orithe stock. f Other and the invention will be apparentfrom the following detailed Adescription taken in conjunction with the Infth'e drawing the' figure represents va diagrammatic -view ofa wool cardingr-machine 'showing myinvention. 1 f .v .v Y. Y In the drawing,- wherei'n like numerals refer .to

like parts, the usual feed rolls I deliver stock to be carded onto li-ckerinlor--tumbler 4 and thence to main'cylinder or swift- 2 which rotates at relative highspeed Such as 41000 to 1200 feet'lper minute. The teeth of cylinder 2 are pitched forward and! pointed inthe direction f in which Y the receiving to the delivering endofthemachine. l 'f f Around cylinder 2 are arranged a plurality of sets, indicated at A, B, C, D and E, of workers 6 having teeth point to point with those on the cylinder and strippers 5 which engage the workers and have teeth ba-ck to point with those on the main cylinder. Each worker 6, rotating at a slower speed than the main cylinder 2 receives a portion of stock from the cylinder and each stripper 5.1rotating faster than its companion worker 6 but slower than the cylinder 2, receives all the stock from the worker and returns it to the cylinder. A portion of the returned stock is reworked by the same worker and a portion proceeds vto the succeeding worker. This cycle continues with each set of workersl and strip-pers A, B, C, D and E.the loadbecoming lighter as the stock approaches the last set E.

I have illustrated and described up to this point merelya vconventionalA system. In such a con' ventional system, it is customary to position a fancy, not shown, after the worker and stripper set E traveling at a faster surface speed than the cylinder 2 and having wire points pitched back to back with the cylinder teeth to cause a brushpreferably inadmixture with -new furtherrobjects: and advantagesfof In the present invention such fancy and doier are omitted. An additional Worker I0 replaces the ordinary doffer and, like the workers 6, is

provided with teeth pitched point to point against the cylinder teeth and travels at a slower rate of speed than the cylinder 2. Worker l0 receives only the desirable stock on the outer surface of the main cylinder which has been subjected Ato thecarding actiorimof thepreceding workers'c unadmixed-fw'ith the' undesirable tstock imbedded in the' cylinder whcnp'a'sses 'on to fancy 1. The stock picked up on worker I0 Yis removed by angle stripper 9 which delivers theVj same to a further main cylinderwhichis-simi-A lar in all respects to cylinder 2 and, like cylinder 2, is provided with sets of Workers andstr'ippers A, B, C, D and E and anotheriinalfworker l0 from which the material is stripped by comb I'l in a single worker or any other desired number of worker and stripper sets, or the like, essential features of the invention being that the desirable carded stock is delivered directly from the Workers to a succeeding main cylinder or swift or to the nal delivery point and the imbedded stock is reworked on the same cylinder. regardless of other steps in the method and structural modications in the apparatus.

1 Havingfthus described my Lvxiiventiori. 1I claim:

In the r-nethed of -carding fibrous-1material wherein the material is fed from a feed box to II'fLairelatively high speed rotating cylinder and the the form of a thin web which thence passes onfto i f the usual condenser.

'fancy- 1..;:is':='arranged imbaekotlieach worker 'm1, asishown tollift'bthe imbeddedi-'stio'ck*remainingleorrl-malin cylinders 12;;ands3 without in any Lmannerintert-elsing. with thenecovery of -thepre '-ferred-cardedimaterialdirectly from the werkers lIl). Fancies l not only prevent fillingyfand icloggingmf .cylinders 42'.- and-,3,1Y butgpermit @record- Vfingof':theEim'bedded material lion thesame, cyl- =ider.` f The imbedded imaterial lifted 'fr'oni-cyl-- Mirzfdei; tmaybezrecycled in; yadmi);turefw ithnewly Lied stock from i lickerin;V L If a more intimate mixture of the recycled `andrnewn stock -isvde'sired 5the stockliftedoutiofg'thepyl-indelt 2,- byfancy 'I maybe-z passedgto thefeed box or; -table Vfor-Arnore thorough mixing with theg-neWf-.stoc-kandrein-l;

-ttroduced into .thefsystemthroughf the feed rolls I i f, .i5/" 1 -I g1 'V v zrWhilegI have herein shcwn and;,describedI two .main-cylinders yl? and 3 earch being associated with inve-sets ofyvorkers'and-strippers, it will ,benn'dervstpod'that` thisy arrangement is only. suggestive @and-dyesnotA in any manner limit the invention which-.contemplates the use of, a.- 4single Vor', any desired number of main cylindersandlthe u seof lfllpperfllayer.ofUthe-,material on the cylinder is 1'5 'transferred toi A'and'subjected to the action of a fworker, the improvement which comprises, re- .movingrsaidupper layer of material directly from the worker and conveying it away from the cylindergalifting substantially the remainder of the material from the cylinder, passing the lifted remainder ymfaterial to ,the feed xbox and therein mi-iing the, same-with newmaterialvand rrefeeding the remainder material frinadmixture: `r1@trie-v:trial:wth@cylinder.

f f l WILLIAM, N.XDUNN.

f r.-R.traRENCES 'CITED 

